il·​lu·​mi·​nance i-ˈlü-mə-nən(t)s How to pronounce illuminance (audio)

Example Sentences

Recent Examples on the Web Patients sit in front of a bright light box that gives off 10,000 lux, which is a unit of illuminance. Saleen Martin, USA TODAY, 22 Nov. 2022 Using that information, researchers developed a new standard to measure that light: melanopic equivalent daylight illuminance (EDI). Ashley Abramson,, 19 Apr. 2022 Samsung can use different combinations, by adding additional sensors such as an illuminance sensor and/or an iris sensor. Ewan Spence, Forbes, 18 June 2021 As the full rose moon began to crest over the tops of the townhomes, the blasts from the fireworks started as well, booming in the sky with the moon—illuminance from both God and man. Omar Tate, Bon Appétit, 3 Sep. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'illuminance.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

First Known Use

circa 1938, in the meaning defined above

Time Traveler
The first known use of illuminance was circa 1938

Dictionary Entries Near illuminance

Cite this Entry

“Illuminance.” Dictionary, Merriam-Webster, Accessed 30 Jan. 2023.

Medical Definition


il·​lu·​mi·​nance il-ˈü-mə-nən(t)s How to pronounce illuminance (audio)
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